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Engine Control Module (ECM) X1 (LU3)

GM1590596Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness: Engine
  • OEM: 15499466
  • Service: 88988931
  • Description: 73-Way F Receptacle 0.64 2.8 Series Sealed (BK)

Terminal Part Information
  • Pins: 1, 3, 5, 6, 8, 13, 18, 21, 24, 25, 27, 30, 32, 36, 39, 41, 42, 47, 49, 54, 57, 65-67
  • Terminated Lead: 13575811
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Pins: 2, 9, 10, 15-17, 19, 20, 34, 35, 37, 43, 44, 55, 58, 70-72
  • Terminated Lead: 13575575
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: J/J
  • Pin: 73
  • Terminated Lead: Pending
  • Release Tool: J-38125-12A
  • Diagnostic Test Probe: J-35616-35 (VT)
  • Terminal/Tray: 1326030-8/17
  • Core/Insulation Crimp: A/4
Engine Control Module (ECM) X1 (LU3)

Pin Wire Circuit Function
1 0.35 D-BU 1161 APP Sensor 1 Signal
2 0.5 PU 1670 HO2S High Signal Bank 2 Sensor 2
3 0.5 D-BU 5985 Accessory Wakeup Serial Data
4 - - Not Used
5 0.35 D-GN 335 Low Speed Cooling Fan Relay Control
6 0.35 D-GN/WH 465 Fuel Pump Relay Control - Primary
7 - - Not Used
8 0.35 TN 514 Low Reference (CJ2 or C67)
9 0.5 TN/WH 1669 HO2S Low Signal Bank 1 Sensor 2
10 0.5 TN 1671 H02S Low Signal Bank 2 Sensor 2
11 0.5 BN 5360 Brake Apply Sensor Low Reference
12 - - Not Used
13 0.35 YE 5991 Powertrain Relay Coil Control
14 - - Not Used
15 0.5 GY/WH 3122 HO2S Heater Low Control Bank 1 Sensor 2
16 0.5 OG/WH 3223 HO2S Heater Low Control bank 1 Sensor 2
17 0.5 PU/WH 1668 HO2S High Signal Bank 1 Sensor 2
18 0.35 L-BU 1162 APP Sensor 2 Signal
19 0.5 PK 439 Ignition 1 Voltage
20 0.5 RD/WH 440 Battery Positive Voltage
21 0.35 PU 1272 Low Reference
22-23 - - Not Used
24 0.35 TN/BK 6049 Low Reference
25 0.35 OG/BK 380 A/C Refrigerant Pressure Sensor Signal (CJ2 or C67)
26 0.5 GY/BK 1694 4WD Low Signal (NQG)
27 0.35 BN/WH 419 MIL Control
28-29 - - Not Used
30 0.35 D-GN/WH 459 A/C Compressor Clutch Relay Control (CJ2 or C67)
31 - - Not Used
32 0.35 YE/BK 625 Starter Relay Coil Control
33 - - Not Used
34 0.5 L-GN/BK 822 Vehicle Speed Sensor (VSS) Low Signal (TZ0)
35 - - Not Used
36 0.35 YE 43 Ignition Voltage
37 0.5 YE 492 MAF Sensor Signal
38 - - Not Used
39 0.35 PU 1589 Fuel Level Sensor Signal - Primary
40 - - Not Used
41 0.35 BN 1271 Low Reference
42 0.35 D-GN 890 Fuel Tank Pressure Sensor Signal
43 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus (+)
44 0.5 TN 2501 High Speed GMLAN Serial Data Bus (-)
45 0.5 WH 5359 Brake Apply Sensor Supply Voltage
46 - - Not Used
47 0.35 WH/BK 1164 5-Volt Reference 2
48 - - Not Used
49 0.35 D-BU 473 High Speed Cooling Fan Relay Control
50 0.35 YE/BK 1827 Vehicle Speed Signal (except MEX)
51-53 - - Not Used
54 0.35 OG/BK 6399 Replicated TOS Signal (except TZ0)
0.5 PU/WH 821 Vehicle Speed Sensor (VSS) High Signal (TZ0)
55 0.5 L-BU/WH 6311 TCC Brake Signal
56 0.35 WH/BK 1164 5-Volt Reference 2
57 0.35 OG/BK 1786 Park/Neutral Signal (except TZ0)
0.35 D-GN 1433 Clutch Start Switch Signal (TZ0)
58 0.5 TN 472 IAT Sensor Signal (except MEX)
0.5 TN/BK 472 IAT Sensor Signal (MEX)
59-60 - - Not Used
61 0.5 YE 5361 Brake Apply Sensor Signal
62-64 - - Not Used
65 0.35 GY 2700 5-Volt Reference 1
66 0.35 GY 2709 5-Volt Reference 1
67 0.35 TN 1274 5-Volt Reference 1
68-69 - - Not Used
70 0.5 WH 1310 EVAP Canister Vent Solenoid Control
71 0.5 L-BU 2182 Reverse Lamp Relay Control (TZ0)
72 0.5 TN/WH 1695 Axle Switch Signal (NQG)
73 0.5 PK 1339 Ignition 1 Voltage
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